gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted September 18, 2011 03:18 PM
Need help with my turbo bike
My bike is giving me problems and I can't figure it out for the life of me.... I need your minds.
I have a pcv and autotune and each time I try and go out for a ride, the bike does great idling and going about 5% throttle and under. As soon as I try to give it any more throttle, it literally just shuts off. It doesn't even buck or stutter. I don't get it..... It had a stuttering problem on the dyno from 5-100% throttle, but it would only stutter for a second and then pull itself through. It made 252whp at 6 psi, but now it won't hardly even run. I can't accelerate or ride it on the street. Where should I start diagnosing?
  
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Bigbore4
Zone Head
Posts: 806
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posted September 18, 2011 09:37 PM
Check your grounds on the PC and the autotune. Run them direct to battery, or at minimum run them to the main ground stud under the seat.
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Big_T112
Pro
Posts: 1061
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posted September 21, 2011 10:06 AM
Check your static fuel pressure. I had to run static at 35 psi but I had larger injectors and ran a rising rate FP. through an external pump. I would check with a fuel problem first
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BLK ICE
Pro
we'll leave the light on for u
Posts: 1709
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posted September 21, 2011 10:15 AM
quote:
Check your static fuel pressure. I had to run static at 35 psi but I had larger injectors and ran a rising rate FP. through an external pump. I would check with a fuel problem first
Yep
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NINJA12
Needs a job
Posts: 3310
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posted September 21, 2011 01:51 PM
That means going back to the dyno, i would assume?
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted September 21, 2011 02:03 PM
My static fuel pressure is at 42 psi
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NINJA12
Needs a job
Posts: 3310
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posted September 23, 2011 04:09 AM
unplug your boost reference to the regulator.
IF that helps you may need to lower static or restrict the reference line.
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justoyz2
Zone Head
Justoyz Racing
Posts: 858
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posted September 23, 2011 07:48 AM
did you vent the Map sensor on yur throttle bodies
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2012 zx14R-blue,2012 zx14R-black, 2014 zx14Trbo, 2011 zx10R, 2007 zx10 Turbo.....
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted September 23, 2011 07:52 AM
quote:
unplug your boost reference to the regulator.
IF that helps you may need to lower static or restrict the reference line.
I am not using a rising rate fpr. My fuel system is stock except for a walbro pump and 700cc injectors.
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted September 23, 2011 07:54 AM
quote:
did you vent the Map sensor on yur throttle bodies
Please explain. I did have a one way valve on there, but indont know if it was working correctly. I recently pulled it off to try and get it to run properly under vacuum.
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miketmmns
Expert Class
Posts: 205
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posted September 23, 2011 02:56 PM
I didn't touch my map sensor and haven't had not one problem. I've put probably close to 2000 miles since I put the turbo on.
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NINJA12
Needs a job
Posts: 3310
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posted September 23, 2011 11:20 PM
if the map sensor sees boost, it does strange things with fueling.
Auto zone has a one way check valve. "T" it in between the line going to the sensor. and vent boost to the air
You want it to see vacuum but not boost.
miketmmns i don't know how you get away with that, i got a FI light running 4lbs of boost.
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miketmmns
Expert Class
Posts: 205
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posted September 24, 2011 06:33 AM
Been up to 8 psi and no light.
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1badzx12r
Needs a life
Posts: 8321
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posted September 24, 2011 06:48 AM
maybe mikes map sensor furrooked
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Big_T112
Pro
Posts: 1061
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posted September 24, 2011 05:12 PM
T- on the IAT sensor. Vent boost off of it and let it read full Vac. make sure you don't have a kinked hose. Once I had a cheezy filter on the turbo and it caused the bike to bog.
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Oz Booster
Expert Class
Posts: 230
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posted September 26, 2011 03:31 PM
I would start by removing the PCv put in the std injectors and just try riding it without getting into the boost area, that will tell you if you have a fuel system or tune issue
If you have been trying to autotune with a missfire it may have adjusted the tune beyond usable in that area, as a rich misfire will read lean (unburnt oxygen)
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1badzx14
Expert Class
08 Turbo zx14!!!
Posts: 133
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posted September 27, 2011 06:36 AM
call chris jones 1(352)490-8068
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justoyz2
Zone Head
Justoyz Racing
Posts: 858
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posted September 27, 2011 08:47 AM
It's hard to assist you until you tell what type of components you have on your turbo kit.
Answer the following:
-what type of regulator are you using, (model, etc)
-do you have a check valve on your MAP sensor
-return line from your fuel rail or regulator
-fuel pump size
-injectors
Start here:
I would check with your PC5, I have the same setup and my bike has issues down low. I changed the number in the target table and made them zeros... this will keep the wideband 2 or autotune from trying to regulate the fuel. The autotune will try to richen the fuel alot....
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2012 zx14R-blue,2012 zx14R-black, 2014 zx14Trbo, 2011 zx10R, 2007 zx10 Turbo.....
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted September 27, 2011 09:41 AM
I'm using the stock fuel line and regulator. My only fuel system mods are....
700cc injectors
walbro fuel pump
fuel pressure gauge
I had a check valve on the map sensor but I took it off to try and get it to run just under vacuum. I simply eliminated that to try and figure out whats causing the issues, and I thought maybe the check valve is plugged and not letting the map sensor see any vacuum OR boost.
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Oz Booster
Expert Class
Posts: 230
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posted September 27, 2011 01:15 PM
Check valve on factory map sensor should be tee'd to the sensor line to vent boost to atmosphere not inline or it will lock the sensor to max vac seen .
do you have a copy of your original map that has not been autotuned ?
if so save your current and load the original ,
You need to get back to some sort of base configuration that worked previously in order to identify the probs IE: base tune on big injectors or no pcv on std injectors.
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